I sometimes forget about this feature in Safari—Reader Mode—and it makes reading on the web a much nicer and cleaner experience by eliminating the visual junk on the page and allowing you to focus on the content you want to see. Some articles may not support this but most do.
Here’s a typical article on the web in regular mode. Ugly.
And here’s the same page with Reader enabled. Just click the horizontal lines on the left side of the address bar and Safari will isolate the article content on the page for easier reading.
Reader mode is also available on iOS so you can do this on your iPhone and iPad as well by clicking on the horizontal lines on the left side of the address bar.